We have a faux pearl sweater clip / guard vintage item.  It measures about 7 1/8" in L with the clips / rounds over clips about 1" across the center 1/4" in depth.  There is a faux pearl center chain with faux rounds over the clips.  It is in good condition but does need a bit more of a detail cleaning in between the pearls on the larger rounds.  This is how I obtained this piece - I'm not certain if it was made with clips similar to clip earrings or if someone made it. 

Flower Sweater Clip Guard Vintage